2 * Copyright (c) 2001-2003 The FFmpeg project
4 * first version by Francois Revol (revol@free.fr)
5 * fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
6 * by Mike Melanson (melanson@pcisys.net)
7 * CD-ROM XA ADPCM codec by BERO
8 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
9 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
10 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
11 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
12 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
13 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
14 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
15 * Argonaut Games ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
16 * Simon & Schuster Interactive ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
17 * Ubisoft ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
18 * High Voltage Software ALP decoder by Zane van Iperen (zane@zanevaniperen.com)
19 * Cunning Developments decoder by Zane van Iperen (zane@zanevaniperen.com)
21 * This file is part of FFmpeg.
23 * FFmpeg is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU Lesser General Public
25 * License as published by the Free Software Foundation; either
26 * version 2.1 of the License, or (at your option) any later version.
28 * FFmpeg is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * Lesser General Public License for more details.
33 * You should have received a copy of the GNU Lesser General Public
34 * License along with FFmpeg; if not, write to the Free Software
35 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
39 #include "bytestream.h"
41 #include "adpcm_data.h"
47 * Features and limitations:
49 * Reference documents:
50 * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
51 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
52 * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
53 * http://openquicktime.sourceforge.net/
54 * XAnim sources (xa_codec.c) http://xanim.polter.net/
55 * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
56 * SoX source code http://sox.sourceforge.net/
59 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
60 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
61 * readstr http://www.geocities.co.jp/Playtown/2004/
64 /* These are for CD-ROM XA ADPCM */
65 static const int8_t xa_adpcm_table[5][2] = {
73 static const int16_t ea_adpcm_table[] = {
81 // padded to zero where table size is less then 16
82 static const int8_t swf_index_tables[4][16] = {
84 /*3*/ { -1, -1, 2, 4 },
85 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
86 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
89 static const int8_t zork_index_table[8] = {
90 -1, -1, -1, 1, 4, 7, 10, 12,
93 static const int8_t mtf_index_table[16] = {
94 8, 6, 4, 2, -1, -1, -1, -1,
95 -1, -1, -1, -1, 2, 4, 6, 8,
100 typedef struct ADPCMDecodeContext {
101 ADPCMChannelStatus status[14];
102 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
104 } ADPCMDecodeContext;
106 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
108 ADPCMDecodeContext *c = avctx->priv_data;
109 unsigned int min_channels = 1;
110 unsigned int max_channels = 2;
112 switch(avctx->codec->id) {
113 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
116 case AV_CODEC_ID_ADPCM_DTK:
117 case AV_CODEC_ID_ADPCM_EA:
120 case AV_CODEC_ID_ADPCM_AFC:
121 case AV_CODEC_ID_ADPCM_EA_R1:
122 case AV_CODEC_ID_ADPCM_EA_R2:
123 case AV_CODEC_ID_ADPCM_EA_R3:
124 case AV_CODEC_ID_ADPCM_EA_XAS:
125 case AV_CODEC_ID_ADPCM_MS:
128 case AV_CODEC_ID_ADPCM_MTAF:
131 if (avctx->channels & 1) {
132 avpriv_request_sample(avctx, "channel count %d\n", avctx->channels);
133 return AVERROR_PATCHWELCOME;
136 case AV_CODEC_ID_ADPCM_PSX:
139 case AV_CODEC_ID_ADPCM_IMA_DAT4:
140 case AV_CODEC_ID_ADPCM_THP:
141 case AV_CODEC_ID_ADPCM_THP_LE:
145 if (avctx->channels < min_channels || avctx->channels > max_channels) {
146 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
147 return AVERROR(EINVAL);
150 switch(avctx->codec->id) {
151 case AV_CODEC_ID_ADPCM_CT:
152 c->status[0].step = c->status[1].step = 511;
154 case AV_CODEC_ID_ADPCM_IMA_WAV:
155 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
156 return AVERROR_INVALIDDATA;
158 case AV_CODEC_ID_ADPCM_IMA_APC:
159 if (avctx->extradata && avctx->extradata_size >= 8) {
160 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata ), 18);
161 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
164 case AV_CODEC_ID_ADPCM_IMA_APM:
165 if (avctx->extradata) {
166 if (avctx->extradata_size >= 28) {
167 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 16), 18);
168 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 20), 0, 88);
169 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
170 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 8), 0, 88);
171 } else if (avctx->extradata_size >= 16) {
172 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 0), 18);
173 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 4), 0, 88);
174 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 8), 18);
175 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 12), 0, 88);
179 case AV_CODEC_ID_ADPCM_IMA_WS:
180 if (avctx->extradata && avctx->extradata_size >= 2)
181 c->vqa_version = AV_RL16(avctx->extradata);
183 case AV_CODEC_ID_ADPCM_ARGO:
184 if (avctx->bits_per_coded_sample != 4 || avctx->block_align != 17 * avctx->channels)
185 return AVERROR_INVALIDDATA;
187 case AV_CODEC_ID_ADPCM_ZORK:
188 if (avctx->bits_per_coded_sample != 8)
189 return AVERROR_INVALIDDATA;
195 switch (avctx->codec->id) {
196 case AV_CODEC_ID_ADPCM_AICA:
197 case AV_CODEC_ID_ADPCM_IMA_DAT4:
198 case AV_CODEC_ID_ADPCM_IMA_QT:
199 case AV_CODEC_ID_ADPCM_IMA_WAV:
200 case AV_CODEC_ID_ADPCM_4XM:
201 case AV_CODEC_ID_ADPCM_XA:
202 case AV_CODEC_ID_ADPCM_EA_R1:
203 case AV_CODEC_ID_ADPCM_EA_R2:
204 case AV_CODEC_ID_ADPCM_EA_R3:
205 case AV_CODEC_ID_ADPCM_EA_XAS:
206 case AV_CODEC_ID_ADPCM_THP:
207 case AV_CODEC_ID_ADPCM_THP_LE:
208 case AV_CODEC_ID_ADPCM_AFC:
209 case AV_CODEC_ID_ADPCM_DTK:
210 case AV_CODEC_ID_ADPCM_PSX:
211 case AV_CODEC_ID_ADPCM_MTAF:
212 case AV_CODEC_ID_ADPCM_ARGO:
213 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
214 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
216 case AV_CODEC_ID_ADPCM_IMA_WS:
217 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
220 case AV_CODEC_ID_ADPCM_MS:
221 avctx->sample_fmt = avctx->channels > 2 ? AV_SAMPLE_FMT_S16P :
225 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
231 static inline int16_t adpcm_agm_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
233 int delta, pred, step, add;
238 add = (delta * 2 + 1) * step;
242 if ((nibble & 8) == 0)
243 pred = av_clip(pred + (add >> 3), -32767, 32767);
245 pred = av_clip(pred - (add >> 3), -32767, 32767);
252 c->step = av_clip(c->step * 2, 127, 24576);
270 c->step = av_clip(c->step, 127, 24576);
275 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
279 int sign, delta, diff, step;
281 step = ff_adpcm_step_table[c->step_index];
282 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
283 step_index = av_clip(step_index, 0, 88);
287 /* perform direct multiplication instead of series of jumps proposed by
288 * the reference ADPCM implementation since modern CPUs can do the mults
290 diff = ((2 * delta + 1) * step) >> shift;
291 predictor = c->predictor;
292 if (sign) predictor -= diff;
293 else predictor += diff;
295 c->predictor = av_clip_int16(predictor);
296 c->step_index = step_index;
298 return (int16_t)c->predictor;
301 static inline int16_t adpcm_ima_alp_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
305 int sign, delta, diff, step;
307 step = ff_adpcm_step_table[c->step_index];
308 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
309 step_index = av_clip(step_index, 0, 88);
313 diff = (delta * step) >> shift;
314 predictor = c->predictor;
315 if (sign) predictor -= diff;
316 else predictor += diff;
318 c->predictor = av_clip_int16(predictor);
319 c->step_index = step_index;
321 return (int16_t)c->predictor;
324 static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nibble)
326 int step_index, step, delta, predictor;
328 step = ff_adpcm_step_table[c->step_index];
330 delta = step * (2 * nibble - 15);
331 predictor = c->predictor + delta;
333 step_index = c->step_index + mtf_index_table[(unsigned)nibble];
334 c->predictor = av_clip_int16(predictor >> 4);
335 c->step_index = av_clip(step_index, 0, 88);
337 return (int16_t)c->predictor;
340 static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
346 nibble = sign_extend(nibble & 0xF, 4);
348 step = ff_adpcm_ima_cunning_step_table[c->step_index];
349 step_index = c->step_index + ff_adpcm_ima_cunning_index_table[abs(nibble)];
350 step_index = av_clip(step_index, 0, 60);
352 predictor = c->predictor + step * nibble;
354 c->predictor = av_clip_int16(predictor);
355 c->step_index = step_index;
360 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
362 int nibble, step_index, predictor, sign, delta, diff, step, shift;
365 nibble = get_bits_le(gb, bps),
366 step = ff_adpcm_step_table[c->step_index];
367 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
368 step_index = av_clip(step_index, 0, 88);
370 sign = nibble & (1 << shift);
371 delta = av_mod_uintp2(nibble, shift);
372 diff = ((2 * delta + 1) * step) >> shift;
373 predictor = c->predictor;
374 if (sign) predictor -= diff;
375 else predictor += diff;
377 c->predictor = av_clip_int16(predictor);
378 c->step_index = step_index;
380 return (int16_t)c->predictor;
383 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble)
389 step = ff_adpcm_step_table[c->step_index];
390 step_index = c->step_index + ff_adpcm_index_table[nibble];
391 step_index = av_clip(step_index, 0, 88);
394 if (nibble & 4) diff += step;
395 if (nibble & 2) diff += step >> 1;
396 if (nibble & 1) diff += step >> 2;
399 predictor = c->predictor - diff;
401 predictor = c->predictor + diff;
403 c->predictor = av_clip_int16(predictor);
404 c->step_index = step_index;
409 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
413 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
414 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
416 c->sample2 = c->sample1;
417 c->sample1 = av_clip_int16(predictor);
418 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
419 if (c->idelta < 16) c->idelta = 16;
420 if (c->idelta > INT_MAX/768) {
421 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
422 c->idelta = INT_MAX/768;
428 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
430 int step_index, predictor, sign, delta, diff, step;
432 step = ff_adpcm_oki_step_table[c->step_index];
433 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
434 step_index = av_clip(step_index, 0, 48);
438 diff = ((2 * delta + 1) * step) >> 3;
439 predictor = c->predictor;
440 if (sign) predictor -= diff;
441 else predictor += diff;
443 c->predictor = av_clip_intp2(predictor, 11);
444 c->step_index = step_index;
446 return c->predictor * 16;
449 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
451 int sign, delta, diff;
456 /* perform direct multiplication instead of series of jumps proposed by
457 * the reference ADPCM implementation since modern CPUs can do the mults
459 diff = ((2 * delta + 1) * c->step) >> 3;
460 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
461 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
462 c->predictor = av_clip_int16(c->predictor);
463 /* calculate new step and clamp it to range 511..32767 */
464 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
465 c->step = av_clip(new_step, 511, 32767);
467 return (int16_t)c->predictor;
470 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
472 int sign, delta, diff;
474 sign = nibble & (1<<(size-1));
475 delta = nibble & ((1<<(size-1))-1);
476 diff = delta << (7 + c->step + shift);
479 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
481 /* calculate new step */
482 if (delta >= (2*size - 3) && c->step < 3)
484 else if (delta == 0 && c->step > 0)
487 return (int16_t) c->predictor;
490 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
497 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
498 c->predictor = av_clip_int16(c->predictor);
499 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
500 c->step = av_clip(c->step, 127, 24576);
504 static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
506 c->predictor += ff_adpcm_mtaf_stepsize[c->step][nibble];
507 c->predictor = av_clip_int16(c->predictor);
508 c->step += ff_adpcm_index_table[nibble];
509 c->step = av_clip_uintp2(c->step, 5);
513 static inline int16_t adpcm_zork_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
515 int16_t index = c->step_index;
516 uint32_t lookup_sample = ff_adpcm_step_table[index];
520 sample += lookup_sample;
522 sample += lookup_sample >> 1;
524 sample += lookup_sample >> 2;
526 sample += lookup_sample >> 3;
528 sample += lookup_sample >> 4;
530 sample += lookup_sample >> 5;
532 sample += lookup_sample >> 6;
536 sample += c->predictor;
537 sample = av_clip_int16(sample);
539 index += zork_index_table[(nibble >> 4) & 7];
540 index = av_clip(index, 0, 88);
542 c->predictor = sample;
543 c->step_index = index;
548 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
549 const uint8_t *in, ADPCMChannelStatus *left,
550 ADPCMChannelStatus *right, int channels, int sample_offset)
553 int shift,filter,f0,f1;
557 out0 += sample_offset;
561 out1 += sample_offset;
564 shift = 12 - (in[4+i*2] & 15);
565 filter = in[4+i*2] >> 4;
566 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
567 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
571 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
574 f0 = xa_adpcm_table[filter][0];
575 f1 = xa_adpcm_table[filter][1];
583 t = sign_extend(d, 4);
584 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
586 s_1 = av_clip_int16(s);
593 s_1 = right->sample1;
594 s_2 = right->sample2;
597 shift = 12 - (in[5+i*2] & 15);
598 filter = in[5+i*2] >> 4;
599 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) {
600 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
604 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
608 f0 = xa_adpcm_table[filter][0];
609 f1 = xa_adpcm_table[filter][1];
614 t = sign_extend(d >> 4, 4);
615 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
617 s_1 = av_clip_int16(s);
622 right->sample1 = s_1;
623 right->sample2 = s_2;
629 out0 += 28 * (3 - channels);
630 out1 += 28 * (3 - channels);
636 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
638 ADPCMDecodeContext *c = avctx->priv_data;
641 int k0, signmask, nb_bits, count;
642 int size = buf_size*8;
645 init_get_bits(&gb, buf, size);
647 //read bits & initial values
648 nb_bits = get_bits(&gb, 2)+2;
649 table = swf_index_tables[nb_bits-2];
650 k0 = 1 << (nb_bits-2);
651 signmask = 1 << (nb_bits-1);
653 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
654 for (i = 0; i < avctx->channels; i++) {
655 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
656 c->status[i].step_index = get_bits(&gb, 6);
659 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
662 for (i = 0; i < avctx->channels; i++) {
663 // similar to IMA adpcm
664 int delta = get_bits(&gb, nb_bits);
665 int step = ff_adpcm_step_table[c->status[i].step_index];
666 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
677 if (delta & signmask)
678 c->status[i].predictor -= vpdiff;
680 c->status[i].predictor += vpdiff;
682 c->status[i].step_index += table[delta & (~signmask)];
684 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
685 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
687 *samples++ = c->status[i].predictor;
693 int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag)
695 int sample = sign_extend(nibble, 4) * (1 << shift);
698 sample += (8 * cs->sample1) - (4 * cs->sample2);
700 sample += 4 * cs->sample1;
702 sample = av_clip_int16(sample >> 2);
704 cs->sample2 = cs->sample1;
705 cs->sample1 = sample;
711 * Get the number of samples (per channel) that will be decoded from the packet.
712 * In one case, this is actually the maximum number of samples possible to
713 * decode with the given buf_size.
715 * @param[out] coded_samples set to the number of samples as coded in the
716 * packet, or 0 if the codec does not encode the
717 * number of samples in each frame.
718 * @param[out] approx_nb_samples set to non-zero if the number of samples
719 * returned is an approximation.
721 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
722 int buf_size, int *coded_samples, int *approx_nb_samples)
724 ADPCMDecodeContext *s = avctx->priv_data;
726 int ch = avctx->channels;
727 int has_coded_samples = 0;
731 *approx_nb_samples = 0;
736 switch (avctx->codec->id) {
737 /* constant, only check buf_size */
738 case AV_CODEC_ID_ADPCM_EA_XAS:
739 if (buf_size < 76 * ch)
743 case AV_CODEC_ID_ADPCM_IMA_QT:
744 if (buf_size < 34 * ch)
748 /* simple 4-bit adpcm */
749 case AV_CODEC_ID_ADPCM_CT:
750 case AV_CODEC_ID_ADPCM_IMA_APC:
751 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
752 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
753 case AV_CODEC_ID_ADPCM_IMA_OKI:
754 case AV_CODEC_ID_ADPCM_IMA_WS:
755 case AV_CODEC_ID_ADPCM_YAMAHA:
756 case AV_CODEC_ID_ADPCM_AICA:
757 case AV_CODEC_ID_ADPCM_IMA_SSI:
758 case AV_CODEC_ID_ADPCM_IMA_APM:
759 case AV_CODEC_ID_ADPCM_IMA_ALP:
760 case AV_CODEC_ID_ADPCM_IMA_MTF:
761 nb_samples = buf_size * 2 / ch;
767 /* simple 4-bit adpcm, with header */
769 switch (avctx->codec->id) {
770 case AV_CODEC_ID_ADPCM_4XM:
771 case AV_CODEC_ID_ADPCM_AGM:
772 case AV_CODEC_ID_ADPCM_IMA_DAT4:
773 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
774 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
775 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
776 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
779 return (buf_size - header_size) * 2 / ch;
781 /* more complex formats */
782 switch (avctx->codec->id) {
783 case AV_CODEC_ID_ADPCM_EA:
784 has_coded_samples = 1;
785 *coded_samples = bytestream2_get_le32(gb);
786 *coded_samples -= *coded_samples % 28;
787 nb_samples = (buf_size - 12) / 30 * 28;
789 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
790 has_coded_samples = 1;
791 *coded_samples = bytestream2_get_le32(gb);
792 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
794 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
795 nb_samples = (buf_size - ch) / ch * 2;
797 case AV_CODEC_ID_ADPCM_EA_R1:
798 case AV_CODEC_ID_ADPCM_EA_R2:
799 case AV_CODEC_ID_ADPCM_EA_R3:
800 /* maximum number of samples */
801 /* has internal offsets and a per-frame switch to signal raw 16-bit */
802 has_coded_samples = 1;
803 switch (avctx->codec->id) {
804 case AV_CODEC_ID_ADPCM_EA_R1:
805 header_size = 4 + 9 * ch;
806 *coded_samples = bytestream2_get_le32(gb);
808 case AV_CODEC_ID_ADPCM_EA_R2:
809 header_size = 4 + 5 * ch;
810 *coded_samples = bytestream2_get_le32(gb);
812 case AV_CODEC_ID_ADPCM_EA_R3:
813 header_size = 4 + 5 * ch;
814 *coded_samples = bytestream2_get_be32(gb);
817 *coded_samples -= *coded_samples % 28;
818 nb_samples = (buf_size - header_size) * 2 / ch;
819 nb_samples -= nb_samples % 28;
820 *approx_nb_samples = 1;
822 case AV_CODEC_ID_ADPCM_IMA_DK3:
823 if (avctx->block_align > 0)
824 buf_size = FFMIN(buf_size, avctx->block_align);
825 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
827 case AV_CODEC_ID_ADPCM_IMA_DK4:
828 if (avctx->block_align > 0)
829 buf_size = FFMIN(buf_size, avctx->block_align);
830 if (buf_size < 4 * ch)
831 return AVERROR_INVALIDDATA;
832 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
834 case AV_CODEC_ID_ADPCM_IMA_RAD:
835 if (avctx->block_align > 0)
836 buf_size = FFMIN(buf_size, avctx->block_align);
837 nb_samples = (buf_size - 4 * ch) * 2 / ch;
839 case AV_CODEC_ID_ADPCM_IMA_WAV:
841 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
842 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
843 if (avctx->block_align > 0)
844 buf_size = FFMIN(buf_size, avctx->block_align);
845 if (buf_size < 4 * ch)
846 return AVERROR_INVALIDDATA;
847 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
850 case AV_CODEC_ID_ADPCM_MS:
851 if (avctx->block_align > 0)
852 buf_size = FFMIN(buf_size, avctx->block_align);
853 nb_samples = (buf_size - 6 * ch) * 2 / ch;
855 case AV_CODEC_ID_ADPCM_MTAF:
856 if (avctx->block_align > 0)
857 buf_size = FFMIN(buf_size, avctx->block_align);
858 nb_samples = (buf_size - 16 * (ch / 2)) * 2 / ch;
860 case AV_CODEC_ID_ADPCM_SBPRO_2:
861 case AV_CODEC_ID_ADPCM_SBPRO_3:
862 case AV_CODEC_ID_ADPCM_SBPRO_4:
864 int samples_per_byte;
865 switch (avctx->codec->id) {
866 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
867 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
868 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
870 if (!s->status[0].step_index) {
872 return AVERROR_INVALIDDATA;
876 nb_samples += buf_size * samples_per_byte / ch;
879 case AV_CODEC_ID_ADPCM_SWF:
881 int buf_bits = buf_size * 8 - 2;
882 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
883 int block_hdr_size = 22 * ch;
884 int block_size = block_hdr_size + nbits * ch * 4095;
885 int nblocks = buf_bits / block_size;
886 int bits_left = buf_bits - nblocks * block_size;
887 nb_samples = nblocks * 4096;
888 if (bits_left >= block_hdr_size)
889 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
892 case AV_CODEC_ID_ADPCM_THP:
893 case AV_CODEC_ID_ADPCM_THP_LE:
894 if (avctx->extradata) {
895 nb_samples = buf_size * 14 / (8 * ch);
898 has_coded_samples = 1;
899 bytestream2_skip(gb, 4); // channel size
900 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
901 bytestream2_get_le32(gb) :
902 bytestream2_get_be32(gb);
903 buf_size -= 8 + 36 * ch;
905 nb_samples = buf_size / 8 * 14;
906 if (buf_size % 8 > 1)
907 nb_samples += (buf_size % 8 - 1) * 2;
908 *approx_nb_samples = 1;
910 case AV_CODEC_ID_ADPCM_AFC:
911 nb_samples = buf_size / (9 * ch) * 16;
913 case AV_CODEC_ID_ADPCM_XA:
914 nb_samples = (buf_size / 128) * 224 / ch;
916 case AV_CODEC_ID_ADPCM_DTK:
917 case AV_CODEC_ID_ADPCM_PSX:
918 nb_samples = buf_size / (16 * ch) * 28;
920 case AV_CODEC_ID_ADPCM_ARGO:
921 nb_samples = buf_size / avctx->block_align * 32;
923 case AV_CODEC_ID_ADPCM_ZORK:
924 nb_samples = buf_size / ch;
928 /* validate coded sample count */
929 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
930 return AVERROR_INVALIDDATA;
935 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
936 int *got_frame_ptr, AVPacket *avpkt)
938 AVFrame *frame = data;
939 const uint8_t *buf = avpkt->data;
940 int buf_size = avpkt->size;
941 ADPCMDecodeContext *c = avctx->priv_data;
942 ADPCMChannelStatus *cs;
943 int n, m, channel, i;
948 int nb_samples, coded_samples, approx_nb_samples, ret;
951 bytestream2_init(&gb, buf, buf_size);
952 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
953 if (nb_samples <= 0) {
954 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
955 return AVERROR_INVALIDDATA;
958 /* get output buffer */
959 frame->nb_samples = nb_samples;
960 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
962 samples = (int16_t *)frame->data[0];
963 samples_p = (int16_t **)frame->extended_data;
965 /* use coded_samples when applicable */
966 /* it is always <= nb_samples, so the output buffer will be large enough */
968 if (!approx_nb_samples && coded_samples != nb_samples)
969 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
970 frame->nb_samples = nb_samples = coded_samples;
973 st = avctx->channels == 2 ? 1 : 0;
975 switch(avctx->codec->id) {
976 case AV_CODEC_ID_ADPCM_IMA_QT:
977 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
978 Channel data is interleaved per-chunk. */
979 for (channel = 0; channel < avctx->channels; channel++) {
982 cs = &(c->status[channel]);
983 /* (pppppp) (piiiiiii) */
985 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
986 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
987 step_index = predictor & 0x7F;
990 if (cs->step_index == step_index) {
991 int diff = predictor - cs->predictor;
998 cs->step_index = step_index;
999 cs->predictor = predictor;
1002 if (cs->step_index > 88u){
1003 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1004 channel, cs->step_index);
1005 return AVERROR_INVALIDDATA;
1008 samples = samples_p[channel];
1010 for (m = 0; m < 64; m += 2) {
1011 int byte = bytestream2_get_byteu(&gb);
1012 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F);
1013 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 );
1017 case AV_CODEC_ID_ADPCM_IMA_WAV:
1018 for(i=0; i<avctx->channels; i++){
1019 cs = &(c->status[i]);
1020 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
1022 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1023 if (cs->step_index > 88u){
1024 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1026 return AVERROR_INVALIDDATA;
1030 if (avctx->bits_per_coded_sample != 4) {
1031 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
1032 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
1033 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
1036 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
1037 for (i = 0; i < avctx->channels; i++) {
1041 samples = &samples_p[i][1 + n * samples_per_block];
1042 for (j = 0; j < block_size; j++) {
1043 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
1044 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
1046 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
1049 for (m = 0; m < samples_per_block; m++) {
1050 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
1051 avctx->bits_per_coded_sample);
1055 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
1057 for (n = 0; n < (nb_samples - 1) / 8; n++) {
1058 for (i = 0; i < avctx->channels; i++) {
1060 samples = &samples_p[i][1 + n * 8];
1061 for (m = 0; m < 8; m += 2) {
1062 int v = bytestream2_get_byteu(&gb);
1063 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1064 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1070 case AV_CODEC_ID_ADPCM_4XM:
1071 for (i = 0; i < avctx->channels; i++)
1072 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1074 for (i = 0; i < avctx->channels; i++) {
1075 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1076 if (c->status[i].step_index > 88u) {
1077 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1078 i, c->status[i].step_index);
1079 return AVERROR_INVALIDDATA;
1083 for (i = 0; i < avctx->channels; i++) {
1084 samples = (int16_t *)frame->data[i];
1086 for (n = nb_samples >> 1; n > 0; n--) {
1087 int v = bytestream2_get_byteu(&gb);
1088 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
1089 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
1093 case AV_CODEC_ID_ADPCM_AGM:
1094 for (i = 0; i < avctx->channels; i++)
1095 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1096 for (i = 0; i < avctx->channels; i++)
1097 c->status[i].step = sign_extend(bytestream2_get_le16u(&gb), 16);
1099 for (n = 0; n < nb_samples >> (1 - st); n++) {
1100 int v = bytestream2_get_byteu(&gb);
1101 *samples++ = adpcm_agm_expand_nibble(&c->status[0], v & 0xF);
1102 *samples++ = adpcm_agm_expand_nibble(&c->status[st], v >> 4 );
1105 case AV_CODEC_ID_ADPCM_MS:
1107 int block_predictor;
1109 if (avctx->channels > 2) {
1110 for (channel = 0; channel < avctx->channels; channel++) {
1111 samples = samples_p[channel];
1112 block_predictor = bytestream2_get_byteu(&gb);
1113 if (block_predictor > 6) {
1114 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[%d] = %d\n",
1115 channel, block_predictor);
1116 return AVERROR_INVALIDDATA;
1118 c->status[channel].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1119 c->status[channel].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1120 c->status[channel].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1121 c->status[channel].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1122 c->status[channel].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1123 *samples++ = c->status[channel].sample2;
1124 *samples++ = c->status[channel].sample1;
1125 for(n = (nb_samples - 2) >> 1; n > 0; n--) {
1126 int byte = bytestream2_get_byteu(&gb);
1127 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte >> 4 );
1128 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte & 0x0F);
1132 block_predictor = bytestream2_get_byteu(&gb);
1133 if (block_predictor > 6) {
1134 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
1136 return AVERROR_INVALIDDATA;
1138 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1139 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1141 block_predictor = bytestream2_get_byteu(&gb);
1142 if (block_predictor > 6) {
1143 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
1145 return AVERROR_INVALIDDATA;
1147 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1148 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1150 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1152 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1155 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1156 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1157 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1158 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1160 *samples++ = c->status[0].sample2;
1161 if (st) *samples++ = c->status[1].sample2;
1162 *samples++ = c->status[0].sample1;
1163 if (st) *samples++ = c->status[1].sample1;
1164 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
1165 int byte = bytestream2_get_byteu(&gb);
1166 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
1167 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
1172 case AV_CODEC_ID_ADPCM_MTAF:
1173 for (channel = 0; channel < avctx->channels; channel+=2) {
1174 bytestream2_skipu(&gb, 4);
1175 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
1176 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
1177 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1178 bytestream2_skipu(&gb, 2);
1179 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1180 bytestream2_skipu(&gb, 2);
1181 for (n = 0; n < nb_samples; n+=2) {
1182 int v = bytestream2_get_byteu(&gb);
1183 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
1184 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
1186 for (n = 0; n < nb_samples; n+=2) {
1187 int v = bytestream2_get_byteu(&gb);
1188 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
1189 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
1193 case AV_CODEC_ID_ADPCM_IMA_DK4:
1194 for (channel = 0; channel < avctx->channels; channel++) {
1195 cs = &c->status[channel];
1196 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
1197 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1198 if (cs->step_index > 88u){
1199 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1200 channel, cs->step_index);
1201 return AVERROR_INVALIDDATA;
1204 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
1205 int v = bytestream2_get_byteu(&gb);
1206 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
1207 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1210 case AV_CODEC_ID_ADPCM_IMA_DK3:
1214 int decode_top_nibble_next = 0;
1216 const int16_t *samples_end = samples + avctx->channels * nb_samples;
1218 bytestream2_skipu(&gb, 10);
1219 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1220 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1221 c->status[0].step_index = bytestream2_get_byteu(&gb);
1222 c->status[1].step_index = bytestream2_get_byteu(&gb);
1223 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
1224 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
1225 c->status[0].step_index, c->status[1].step_index);
1226 return AVERROR_INVALIDDATA;
1228 /* sign extend the predictors */
1229 diff_channel = c->status[1].predictor;
1231 /* DK3 ADPCM support macro */
1232 #define DK3_GET_NEXT_NIBBLE() \
1233 if (decode_top_nibble_next) { \
1234 nibble = last_byte >> 4; \
1235 decode_top_nibble_next = 0; \
1237 last_byte = bytestream2_get_byteu(&gb); \
1238 nibble = last_byte & 0x0F; \
1239 decode_top_nibble_next = 1; \
1242 while (samples < samples_end) {
1244 /* for this algorithm, c->status[0] is the sum channel and
1245 * c->status[1] is the diff channel */
1247 /* process the first predictor of the sum channel */
1248 DK3_GET_NEXT_NIBBLE();
1249 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1251 /* process the diff channel predictor */
1252 DK3_GET_NEXT_NIBBLE();
1253 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1255 /* process the first pair of stereo PCM samples */
1256 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1257 *samples++ = c->status[0].predictor + c->status[1].predictor;
1258 *samples++ = c->status[0].predictor - c->status[1].predictor;
1260 /* process the second predictor of the sum channel */
1261 DK3_GET_NEXT_NIBBLE();
1262 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1264 /* process the second pair of stereo PCM samples */
1265 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1266 *samples++ = c->status[0].predictor + c->status[1].predictor;
1267 *samples++ = c->status[0].predictor - c->status[1].predictor;
1270 if ((bytestream2_tell(&gb) & 1))
1271 bytestream2_skip(&gb, 1);
1274 case AV_CODEC_ID_ADPCM_IMA_ISS:
1275 for (channel = 0; channel < avctx->channels; channel++) {
1276 cs = &c->status[channel];
1277 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1278 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1279 if (cs->step_index > 88u){
1280 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1281 channel, cs->step_index);
1282 return AVERROR_INVALIDDATA;
1286 for (n = nb_samples >> (1 - st); n > 0; n--) {
1288 int v = bytestream2_get_byteu(&gb);
1289 /* nibbles are swapped for mono */
1297 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1298 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1301 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
1302 for (channel = 0; channel < avctx->channels; channel++) {
1303 cs = &c->status[channel];
1304 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1305 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1306 if (cs->step_index > 88u){
1307 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1308 channel, cs->step_index);
1309 return AVERROR_INVALIDDATA;
1313 for (int subframe = 0; subframe < nb_samples / 256; subframe++) {
1314 for (channel = 0; channel < avctx->channels; channel++) {
1315 samples = samples_p[channel] + 256 * subframe;
1316 for (n = 0; n < 256; n += 2) {
1317 int v = bytestream2_get_byteu(&gb);
1318 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1319 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1324 case AV_CODEC_ID_ADPCM_IMA_DAT4:
1325 for (channel = 0; channel < avctx->channels; channel++) {
1326 cs = &c->status[channel];
1327 samples = samples_p[channel];
1328 bytestream2_skip(&gb, 4);
1329 for (n = 0; n < nb_samples; n += 2) {
1330 int v = bytestream2_get_byteu(&gb);
1331 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1332 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1336 case AV_CODEC_ID_ADPCM_IMA_APC:
1337 for (n = nb_samples >> (1 - st); n > 0; n--) {
1338 int v = bytestream2_get_byteu(&gb);
1339 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1340 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1343 case AV_CODEC_ID_ADPCM_IMA_SSI:
1344 for (n = nb_samples >> (1 - st); n > 0; n--) {
1345 int v = bytestream2_get_byteu(&gb);
1346 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0], v >> 4 );
1347 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0x0F);
1350 case AV_CODEC_ID_ADPCM_IMA_APM:
1351 for (n = nb_samples / 2; n > 0; n--) {
1352 for (channel = 0; channel < avctx->channels; channel++) {
1353 int v = bytestream2_get_byteu(&gb);
1354 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[channel], v >> 4 );
1355 samples[st] = adpcm_ima_qt_expand_nibble(&c->status[channel], v & 0x0F);
1357 samples += avctx->channels;
1360 case AV_CODEC_ID_ADPCM_IMA_ALP:
1361 for (n = nb_samples / 2; n > 0; n--) {
1362 for (channel = 0; channel < avctx->channels; channel++) {
1363 int v = bytestream2_get_byteu(&gb);
1364 *samples++ = adpcm_ima_alp_expand_nibble(&c->status[channel], v >> 4 , 2);
1365 samples[st] = adpcm_ima_alp_expand_nibble(&c->status[channel], v & 0x0F, 2);
1367 samples += avctx->channels;
1370 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
1371 for (n = 0; n < nb_samples / 2; n++) {
1372 int v = bytestream2_get_byteu(&gb);
1373 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v & 0x0F);
1374 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v >> 4);
1377 case AV_CODEC_ID_ADPCM_IMA_OKI:
1378 for (n = nb_samples >> (1 - st); n > 0; n--) {
1379 int v = bytestream2_get_byteu(&gb);
1380 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1381 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1384 case AV_CODEC_ID_ADPCM_IMA_RAD:
1385 for (channel = 0; channel < avctx->channels; channel++) {
1386 cs = &c->status[channel];
1387 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1388 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1389 if (cs->step_index > 88u){
1390 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1391 channel, cs->step_index);
1392 return AVERROR_INVALIDDATA;
1395 for (n = 0; n < nb_samples / 2; n++) {
1398 byte[0] = bytestream2_get_byteu(&gb);
1400 byte[1] = bytestream2_get_byteu(&gb);
1401 for(channel = 0; channel < avctx->channels; channel++) {
1402 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1404 for(channel = 0; channel < avctx->channels; channel++) {
1405 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1409 case AV_CODEC_ID_ADPCM_IMA_WS:
1410 if (c->vqa_version == 3) {
1411 for (channel = 0; channel < avctx->channels; channel++) {
1412 int16_t *smp = samples_p[channel];
1414 for (n = nb_samples / 2; n > 0; n--) {
1415 int v = bytestream2_get_byteu(&gb);
1416 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1417 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1421 for (n = nb_samples / 2; n > 0; n--) {
1422 for (channel = 0; channel < avctx->channels; channel++) {
1423 int v = bytestream2_get_byteu(&gb);
1424 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1425 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1427 samples += avctx->channels;
1430 bytestream2_seek(&gb, 0, SEEK_END);
1432 case AV_CODEC_ID_ADPCM_XA:
1434 int16_t *out0 = samples_p[0];
1435 int16_t *out1 = samples_p[1];
1436 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1437 int sample_offset = 0;
1438 int bytes_remaining;
1439 while (bytestream2_get_bytes_left(&gb) >= 128) {
1440 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1441 &c->status[0], &c->status[1],
1442 avctx->channels, sample_offset)) < 0)
1444 bytestream2_skipu(&gb, 128);
1445 sample_offset += samples_per_block;
1447 /* Less than a full block of data left, e.g. when reading from
1448 * 2324 byte per sector XA; the remainder is padding */
1449 bytes_remaining = bytestream2_get_bytes_left(&gb);
1450 if (bytes_remaining > 0) {
1451 bytestream2_skip(&gb, bytes_remaining);
1455 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1456 for (i=0; i<=st; i++) {
1457 c->status[i].step_index = bytestream2_get_le32u(&gb);
1458 if (c->status[i].step_index > 88u) {
1459 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1460 i, c->status[i].step_index);
1461 return AVERROR_INVALIDDATA;
1464 for (i=0; i<=st; i++) {
1465 c->status[i].predictor = bytestream2_get_le32u(&gb);
1466 if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
1467 return AVERROR_INVALIDDATA;
1470 for (n = nb_samples >> (1 - st); n > 0; n--) {
1471 int byte = bytestream2_get_byteu(&gb);
1472 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1473 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1476 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1477 for (n = nb_samples >> (1 - st); n > 0; n--) {
1478 int byte = bytestream2_get_byteu(&gb);
1479 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1480 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1483 case AV_CODEC_ID_ADPCM_EA:
1485 int previous_left_sample, previous_right_sample;
1486 int current_left_sample, current_right_sample;
1487 int next_left_sample, next_right_sample;
1488 int coeff1l, coeff2l, coeff1r, coeff2r;
1489 int shift_left, shift_right;
1491 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1492 each coding 28 stereo samples. */
1494 if(avctx->channels != 2)
1495 return AVERROR_INVALIDDATA;
1497 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1498 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1499 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1500 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1502 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1503 int byte = bytestream2_get_byteu(&gb);
1504 coeff1l = ea_adpcm_table[ byte >> 4 ];
1505 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1506 coeff1r = ea_adpcm_table[ byte & 0x0F];
1507 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1509 byte = bytestream2_get_byteu(&gb);
1510 shift_left = 20 - (byte >> 4);
1511 shift_right = 20 - (byte & 0x0F);
1513 for (count2 = 0; count2 < 28; count2++) {
1514 byte = bytestream2_get_byteu(&gb);
1515 next_left_sample = sign_extend(byte >> 4, 4) * (1 << shift_left);
1516 next_right_sample = sign_extend(byte, 4) * (1 << shift_right);
1518 next_left_sample = (next_left_sample +
1519 (current_left_sample * coeff1l) +
1520 (previous_left_sample * coeff2l) + 0x80) >> 8;
1521 next_right_sample = (next_right_sample +
1522 (current_right_sample * coeff1r) +
1523 (previous_right_sample * coeff2r) + 0x80) >> 8;
1525 previous_left_sample = current_left_sample;
1526 current_left_sample = av_clip_int16(next_left_sample);
1527 previous_right_sample = current_right_sample;
1528 current_right_sample = av_clip_int16(next_right_sample);
1529 *samples++ = current_left_sample;
1530 *samples++ = current_right_sample;
1534 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1538 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1540 int coeff[2][2], shift[2];
1542 for(channel = 0; channel < avctx->channels; channel++) {
1543 int byte = bytestream2_get_byteu(&gb);
1545 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1546 shift[channel] = 20 - (byte & 0x0F);
1548 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1551 byte[0] = bytestream2_get_byteu(&gb);
1552 if (st) byte[1] = bytestream2_get_byteu(&gb);
1553 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1554 for(channel = 0; channel < avctx->channels; channel++) {
1555 int sample = sign_extend(byte[channel] >> i, 4) * (1 << shift[channel]);
1557 c->status[channel].sample1 * coeff[channel][0] +
1558 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1559 c->status[channel].sample2 = c->status[channel].sample1;
1560 c->status[channel].sample1 = av_clip_int16(sample);
1561 *samples++ = c->status[channel].sample1;
1565 bytestream2_seek(&gb, 0, SEEK_END);
1568 case AV_CODEC_ID_ADPCM_EA_R1:
1569 case AV_CODEC_ID_ADPCM_EA_R2:
1570 case AV_CODEC_ID_ADPCM_EA_R3: {
1571 /* channel numbering
1573 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1574 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1575 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1576 int previous_sample, current_sample, next_sample;
1579 unsigned int channel;
1584 for (channel=0; channel<avctx->channels; channel++)
1585 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1586 bytestream2_get_le32(&gb)) +
1587 (avctx->channels + 1) * 4;
1589 for (channel=0; channel<avctx->channels; channel++) {
1590 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1591 samplesC = samples_p[channel];
1593 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1594 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1595 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1597 current_sample = c->status[channel].predictor;
1598 previous_sample = c->status[channel].prev_sample;
1601 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1602 int byte = bytestream2_get_byte(&gb);
1603 if (byte == 0xEE) { /* only seen in R2 and R3 */
1604 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1605 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1607 for (count2=0; count2<28; count2++)
1608 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1610 coeff1 = ea_adpcm_table[ byte >> 4 ];
1611 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1612 shift = 20 - (byte & 0x0F);
1614 for (count2=0; count2<28; count2++) {
1616 next_sample = (unsigned)sign_extend(byte, 4) << shift;
1618 byte = bytestream2_get_byte(&gb);
1619 next_sample = (unsigned)sign_extend(byte >> 4, 4) << shift;
1622 next_sample += (current_sample * coeff1) +
1623 (previous_sample * coeff2);
1624 next_sample = av_clip_int16(next_sample >> 8);
1626 previous_sample = current_sample;
1627 current_sample = next_sample;
1628 *samplesC++ = current_sample;
1634 } else if (count != count1) {
1635 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1636 count = FFMAX(count, count1);
1639 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1640 c->status[channel].predictor = current_sample;
1641 c->status[channel].prev_sample = previous_sample;
1645 frame->nb_samples = count * 28;
1646 bytestream2_seek(&gb, 0, SEEK_END);
1649 case AV_CODEC_ID_ADPCM_EA_XAS:
1650 for (channel=0; channel<avctx->channels; channel++) {
1651 int coeff[2][4], shift[4];
1652 int16_t *s = samples_p[channel];
1653 for (n = 0; n < 4; n++, s += 32) {
1654 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1656 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1659 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1660 shift[n] = 20 - (val & 0x0F);
1664 for (m=2; m<32; m+=2) {
1665 s = &samples_p[channel][m];
1666 for (n = 0; n < 4; n++, s += 32) {
1668 int byte = bytestream2_get_byteu(&gb);
1670 level = sign_extend(byte >> 4, 4) * (1 << shift[n]);
1671 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1672 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1674 level = sign_extend(byte, 4) * (1 << shift[n]);
1675 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1676 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1681 case AV_CODEC_ID_ADPCM_IMA_AMV:
1682 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1683 c->status[0].step_index = bytestream2_get_byteu(&gb);
1684 bytestream2_skipu(&gb, 5);
1685 if (c->status[0].step_index > 88u) {
1686 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1687 c->status[0].step_index);
1688 return AVERROR_INVALIDDATA;
1691 for (n = nb_samples >> (1 - st); n > 0; n--) {
1692 int v = bytestream2_get_byteu(&gb);
1694 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1695 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1698 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1699 for (i = 0; i < avctx->channels; i++) {
1700 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1701 c->status[i].step_index = bytestream2_get_byteu(&gb);
1702 bytestream2_skipu(&gb, 1);
1703 if (c->status[i].step_index > 88u) {
1704 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1705 c->status[i].step_index);
1706 return AVERROR_INVALIDDATA;
1710 for (n = nb_samples >> (1 - st); n > 0; n--) {
1711 int v = bytestream2_get_byteu(&gb);
1713 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4 );
1714 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf);
1717 case AV_CODEC_ID_ADPCM_CT:
1718 for (n = nb_samples >> (1 - st); n > 0; n--) {
1719 int v = bytestream2_get_byteu(&gb);
1720 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1721 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1724 case AV_CODEC_ID_ADPCM_SBPRO_4:
1725 case AV_CODEC_ID_ADPCM_SBPRO_3:
1726 case AV_CODEC_ID_ADPCM_SBPRO_2:
1727 if (!c->status[0].step_index) {
1728 /* the first byte is a raw sample */
1729 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1731 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1732 c->status[0].step_index = 1;
1735 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1736 for (n = nb_samples >> (1 - st); n > 0; n--) {
1737 int byte = bytestream2_get_byteu(&gb);
1738 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1740 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1743 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1744 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1745 int byte = bytestream2_get_byteu(&gb);
1746 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1748 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1749 (byte >> 2) & 0x07, 3, 0);
1750 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1754 for (n = nb_samples >> (2 - st); n > 0; n--) {
1755 int byte = bytestream2_get_byteu(&gb);
1756 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1758 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1759 (byte >> 4) & 0x03, 2, 2);
1760 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1761 (byte >> 2) & 0x03, 2, 2);
1762 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1767 case AV_CODEC_ID_ADPCM_SWF:
1768 adpcm_swf_decode(avctx, buf, buf_size, samples);
1769 bytestream2_seek(&gb, 0, SEEK_END);
1771 case AV_CODEC_ID_ADPCM_YAMAHA:
1772 for (n = nb_samples >> (1 - st); n > 0; n--) {
1773 int v = bytestream2_get_byteu(&gb);
1774 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1775 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1778 case AV_CODEC_ID_ADPCM_AICA:
1779 if (!c->has_status) {
1780 for (channel = 0; channel < avctx->channels; channel++)
1781 c->status[channel].step = 0;
1784 for (channel = 0; channel < avctx->channels; channel++) {
1785 samples = samples_p[channel];
1786 for (n = nb_samples >> 1; n > 0; n--) {
1787 int v = bytestream2_get_byteu(&gb);
1788 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1789 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1793 case AV_CODEC_ID_ADPCM_AFC:
1795 int samples_per_block;
1798 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1799 samples_per_block = avctx->extradata[0] / 16;
1800 blocks = nb_samples / avctx->extradata[0];
1802 samples_per_block = nb_samples / 16;
1806 for (m = 0; m < blocks; m++) {
1807 for (channel = 0; channel < avctx->channels; channel++) {
1808 int prev1 = c->status[channel].sample1;
1809 int prev2 = c->status[channel].sample2;
1811 samples = samples_p[channel] + m * 16;
1812 /* Read in every sample for this channel. */
1813 for (i = 0; i < samples_per_block; i++) {
1814 int byte = bytestream2_get_byteu(&gb);
1815 int scale = 1 << (byte >> 4);
1816 int index = byte & 0xf;
1817 int factor1 = ff_adpcm_afc_coeffs[0][index];
1818 int factor2 = ff_adpcm_afc_coeffs[1][index];
1820 /* Decode 16 samples. */
1821 for (n = 0; n < 16; n++) {
1825 sampledat = sign_extend(byte, 4);
1827 byte = bytestream2_get_byteu(&gb);
1828 sampledat = sign_extend(byte >> 4, 4);
1831 sampledat = ((prev1 * factor1 + prev2 * factor2) >> 11) +
1833 *samples = av_clip_int16(sampledat);
1839 c->status[channel].sample1 = prev1;
1840 c->status[channel].sample2 = prev2;
1843 bytestream2_seek(&gb, 0, SEEK_END);
1846 case AV_CODEC_ID_ADPCM_THP:
1847 case AV_CODEC_ID_ADPCM_THP_LE:
1852 #define THP_GET16(g) \
1854 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1855 bytestream2_get_le16u(&(g)) : \
1856 bytestream2_get_be16u(&(g)), 16)
1858 if (avctx->extradata) {
1860 if (avctx->extradata_size < 32 * avctx->channels) {
1861 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1862 return AVERROR_INVALIDDATA;
1865 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1866 for (i = 0; i < avctx->channels; i++)
1867 for (n = 0; n < 16; n++)
1868 table[i][n] = THP_GET16(tb);
1870 for (i = 0; i < avctx->channels; i++)
1871 for (n = 0; n < 16; n++)
1872 table[i][n] = THP_GET16(gb);
1874 if (!c->has_status) {
1875 /* Initialize the previous sample. */
1876 for (i = 0; i < avctx->channels; i++) {
1877 c->status[i].sample1 = THP_GET16(gb);
1878 c->status[i].sample2 = THP_GET16(gb);
1882 bytestream2_skip(&gb, avctx->channels * 4);
1886 for (ch = 0; ch < avctx->channels; ch++) {
1887 samples = samples_p[ch];
1889 /* Read in every sample for this channel. */
1890 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1891 int byte = bytestream2_get_byteu(&gb);
1892 int index = (byte >> 4) & 7;
1893 unsigned int exp = byte & 0x0F;
1894 int64_t factor1 = table[ch][index * 2];
1895 int64_t factor2 = table[ch][index * 2 + 1];
1897 /* Decode 14 samples. */
1898 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1902 sampledat = sign_extend(byte, 4);
1904 byte = bytestream2_get_byteu(&gb);
1905 sampledat = sign_extend(byte >> 4, 4);
1908 sampledat = ((c->status[ch].sample1 * factor1
1909 + c->status[ch].sample2 * factor2) >> 11) + sampledat * (1 << exp);
1910 *samples = av_clip_int16(sampledat);
1911 c->status[ch].sample2 = c->status[ch].sample1;
1912 c->status[ch].sample1 = *samples++;
1918 case AV_CODEC_ID_ADPCM_DTK:
1919 for (channel = 0; channel < avctx->channels; channel++) {
1920 samples = samples_p[channel];
1922 /* Read in every sample for this channel. */
1923 for (i = 0; i < nb_samples / 28; i++) {
1926 bytestream2_skipu(&gb, 1);
1927 header = bytestream2_get_byteu(&gb);
1928 bytestream2_skipu(&gb, 3 - channel);
1930 /* Decode 28 samples. */
1931 for (n = 0; n < 28; n++) {
1932 int32_t sampledat, prev;
1934 switch (header >> 4) {
1936 prev = (c->status[channel].sample1 * 0x3c);
1939 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1942 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1948 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1950 byte = bytestream2_get_byteu(&gb);
1952 sampledat = sign_extend(byte, 4);
1954 sampledat = sign_extend(byte >> 4, 4);
1956 sampledat = ((sampledat * (1 << 12)) >> (header & 0xf)) * (1 << 6) + prev;
1957 *samples++ = av_clip_int16(sampledat >> 6);
1958 c->status[channel].sample2 = c->status[channel].sample1;
1959 c->status[channel].sample1 = sampledat;
1963 bytestream2_seek(&gb, 0, SEEK_SET);
1966 case AV_CODEC_ID_ADPCM_PSX:
1967 for (int block = 0; block < avpkt->size / FFMAX(avctx->block_align, 16 * avctx->channels); block++) {
1968 int nb_samples_per_block = 28 * FFMAX(avctx->block_align, 16 * avctx->channels) / (16 * avctx->channels);
1969 for (channel = 0; channel < avctx->channels; channel++) {
1970 samples = samples_p[channel] + block * nb_samples_per_block;
1972 /* Read in every sample for this channel. */
1973 for (i = 0; i < nb_samples_per_block / 28; i++) {
1974 int filter, shift, flag, byte;
1976 filter = bytestream2_get_byteu(&gb);
1977 shift = filter & 0xf;
1978 filter = filter >> 4;
1979 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1980 return AVERROR_INVALIDDATA;
1981 flag = bytestream2_get_byteu(&gb);
1983 /* Decode 28 samples. */
1984 for (n = 0; n < 28; n++) {
1985 int sample = 0, scale;
1989 scale = sign_extend(byte >> 4, 4);
1991 byte = bytestream2_get_byteu(&gb);
1992 scale = sign_extend(byte, 4);
1995 scale = scale * (1 << 12);
1996 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
1998 *samples++ = av_clip_int16(sample);
1999 c->status[channel].sample2 = c->status[channel].sample1;
2000 c->status[channel].sample1 = sample;
2006 case AV_CODEC_ID_ADPCM_ARGO:
2008 * The format of each block:
2009 * uint8_t left_control;
2010 * uint4_t left_samples[nb_samples];
2011 * ---- and if stereo ----
2012 * uint8_t right_control;
2013 * uint4_t right_samples[nb_samples];
2015 * Format of the control byte:
2016 * MSB [SSSSRDRR] LSB
2017 * S = (Shift Amount - 2)
2021 * Each block relies on the previous two samples of each channel.
2022 * They should be 0 initially.
2024 for (int block = 0; block < avpkt->size / avctx->block_align; block++) {
2025 for (channel = 0; channel < avctx->channels; channel++) {
2028 samples = samples_p[channel] + block * 32;
2029 cs = c->status + channel;
2031 /* Get the control byte and decode the samples, 2 at a time. */
2032 control = bytestream2_get_byteu(&gb);
2033 shift = (control >> 4) + 2;
2035 for (n = 0; n < 16; n++) {
2036 int sample = bytestream2_get_byteu(&gb);
2037 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 4, shift, control & 0x04);
2038 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 0, shift, control & 0x04);
2043 case AV_CODEC_ID_ADPCM_ZORK:
2044 if (!c->has_status) {
2045 for (channel = 0; channel < avctx->channels; channel++) {
2046 c->status[channel].predictor = 0;
2047 c->status[channel].step_index = 0;
2051 for (n = 0; n < nb_samples * avctx->channels; n++) {
2052 int v = bytestream2_get_byteu(&gb);
2053 *samples++ = adpcm_zork_expand_nibble(&c->status[n % avctx->channels], v);
2056 case AV_CODEC_ID_ADPCM_IMA_MTF:
2057 for (n = nb_samples / 2; n > 0; n--) {
2058 for (channel = 0; channel < avctx->channels; channel++) {
2059 int v = bytestream2_get_byteu(&gb);
2060 *samples++ = adpcm_ima_mtf_expand_nibble(&c->status[channel], v >> 4);
2061 samples[st] = adpcm_ima_mtf_expand_nibble(&c->status[channel], v & 0x0F);
2063 samples += avctx->channels;
2067 av_assert0(0); // unsupported codec_id should not happen
2070 if (avpkt->size && bytestream2_tell(&gb) == 0) {
2071 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
2072 return AVERROR_INVALIDDATA;
2077 if (avpkt->size < bytestream2_tell(&gb)) {
2078 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
2082 return bytestream2_tell(&gb);
2085 static void adpcm_flush(AVCodecContext *avctx)
2087 ADPCMDecodeContext *c = avctx->priv_data;
2092 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
2093 AV_SAMPLE_FMT_NONE };
2094 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
2095 AV_SAMPLE_FMT_NONE };
2096 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
2098 AV_SAMPLE_FMT_NONE };
2100 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
2101 AVCodec ff_ ## name_ ## _decoder = { \
2103 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
2104 .type = AVMEDIA_TYPE_AUDIO, \
2106 .priv_data_size = sizeof(ADPCMDecodeContext), \
2107 .init = adpcm_decode_init, \
2108 .decode = adpcm_decode_frame, \
2109 .flush = adpcm_flush, \
2110 .capabilities = AV_CODEC_CAP_DR1, \
2111 .sample_fmts = sample_fmts_, \
2114 /* Note: Do not forget to add new entries to the Makefile as well. */
2115 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
2116 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
2117 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie");
2118 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
2119 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games");
2120 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
2121 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
2122 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
2123 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
2124 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
2125 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
2126 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
2127 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
2128 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
2129 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
2130 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM");
2131 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_CUNNING, sample_fmts_s16, adpcm_ima_cunning, "ADPCM IMA Cunning Developments");
2132 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
2133 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
2134 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
2135 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
2136 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
2137 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
2138 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX");
2139 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework");
2140 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
2141 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
2142 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
2143 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SSI, sample_fmts_s16, adpcm_ima_ssi, "ADPCM IMA Simon & Schuster Interactive");
2144 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
2145 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ALP, sample_fmts_s16, adpcm_ima_alp, "ADPCM IMA High Voltage Software ALP");
2146 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
2147 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
2148 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_both, adpcm_ms, "ADPCM Microsoft");
2149 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF");
2150 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
2151 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
2152 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
2153 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
2154 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
2155 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
2156 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
2157 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
2158 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");
2159 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ZORK, sample_fmts_s16, adpcm_zork, "ADPCM Zork");